"Some stuff was said," said Young, who took a 4-0 lead before exiting in straight sets (7-5, 6-4, 6-4).

The second-ranked American said he was responding to comments from a spectator, but acknowledged that it affected his performance.

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"It was kind of annoying. It was like something about, 'Go ahead and cry to your mother again.’ It made me pretty mad. So I said shut up. It wasn’t beneficial," said Young. "And I was down 5-6, all that combination wasn’t great."

The defeat could see Young, currently ranked No. 47, fall from the Top 50 in the rankings.